How long will take to get a work permit czech...

To obtain a work visa in Czech Republic, you must obtain a work contract, and then go to the Embassy of Czech Republic in the country where you reside, and apply for a visa,
The application shall be accompanied by the following documents:
1) Copy of a valid passport for at least six months 
2) Two photographs with the same specifications of passport photo with white background for each
3) booking flight
4) Copy of the contract of employment or letter of employment

You can contact the embassy to inquire about the time taken to obtain the visa through the following link:

Embassy

Usually, the approval period for obtaining the visa ranges from 3 months to 6 months from the date of application